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slightly faster saturation checking 

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@6594 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
beveloper 2004-02-15 15:51:39 +00:00
parent e443332206
commit 93d87149dc
1 changed files with 18 additions and 12 deletions
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30
src/add-ons/media/plugins/avcodec/gfx_conv_c.cpp
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@ -173,6 +173,12 @@ void gfx_conv_yuv411p_rgb32_c(AVFrame *in, AVFrame *out, int width, int height)
gfx_conv_null_c(in, out, width, height);
}
// Macro to limit the signed a into range 0-255, first one seems to be fastest
#define SATURATE(a) if (0xffffff00 & (uint32)a) { if (a < 0) a = 0; else a = 255; }
// #define SATURATE(a) if (0xffffff00 & (uint32)a) { if (0x80000000 & (uint32)a) a = 0; else a = 0xff; }
// #define SATURATE(a) if (a < 0) a = 0; else if (a > 255) a = 255;
// #define SATURATE(a) if (a < 0) a = 0; else if (a & 0xffffff00) a = 255;
// #define SATURATE(a) if (a < 0) a = 0; if (a & 0xffffff00) a = 255;
void gfx_conv_yuv420p_rgb32_c(AVFrame *in, AVFrame *out, int width, int height)
{
@ -215,19 +221,19 @@ void gfx_conv_yuv420p_rgb32_c(AVFrame *in, AVFrame *out, int width, int height)
Y1 = (((G & 0x0000ff00) >> 8) - 16) * 38142;
R = (Y0 + Cr_R) >> 15;
if (R < 0) R = 0; else if (R > 255) R = 255;
SATURATE(R);
G = (Y0 + Cr_G + Cb_G) >> 15;
if (G < 0) G = 0; else if (G > 255) G = 255;
SATURATE(G);
B = (Y0 + Cb_B) >> 15;
if (B < 0) B = 0; else if (B > 255) B = 255;
SATURATE(B);
poutEven[j] = (R << 16) | (G << 8) | B;
R = (Y1 + Cr_R) >> 15;
if (R < 0) R = 0; else if (R > 255) R = 255;
SATURATE(R);
G = (Y1 + Cr_G + Cb_G) >> 15;
if (G < 0) G = 0; else if (G > 255) G = 255;
SATURATE(G);
B = (Y1 + Cb_B) >> 15;
if (B < 0) B = 0; else if (B > 255) B = 255;
SATURATE(B);
poutEven[j + 1] = (R << 16) | (G << 8) | B;
G = *(uint16 *)pi1Odd;
@ -236,19 +242,19 @@ void gfx_conv_yuv420p_rgb32_c(AVFrame *in, AVFrame *out, int width, int height)
Y1 = (((G & 0x0000ff00) >> 8) - 16) * 38142;
R = (Y0 + Cr_R) >> 15;
if (R < 0) R = 0; else if (R > 255) R = 255;
SATURATE(R);
G = (Y0 + Cr_G + Cb_G) >> 15;
if (G < 0) G = 0; else if (G > 255) G = 255;
SATURATE(G);
B = (Y0 + Cb_B) >> 15;
if (B < 0) B = 0; else if (B > 255) B = 255;
SATURATE(B);
poutOdd[j] = (R << 16) | (G << 8) | B;
R = (Y1 + Cr_R) >> 15;
if (R < 0) R = 0; else if (R > 255) R = 255;
SATURATE(R);
G = (Y1 + Cr_G + Cb_G) >> 15;
if (G < 0) G = 0; else if (G > 255) G = 255;
SATURATE(G);
B = (Y1 + Cb_B) >> 15;
if (B < 0) B = 0; else if (B > 255) B = 255;
SATURATE(B);
poutOdd[j + 1] = (R << 16) | (G << 8) | B;
}
poutEven = (uint32 *)(poutInc + (uint8 *)poutEven);